LECTURE ON BRISBANE POND LIFE. 



(Summary of Lecture.) 



By W. R. COLLEDGE. 



Before the Royal Society of Queensland, November 28tk. 1908. 



The lecturer, dealing with the subject generally, spoke upon 

 the adaptation of the creatures to their environment, their 

 great fertility, and the peculiar provision, by means of 

 ephyppial eggs in the Entomostraca, for preserving and 

 propagating their species in unfavourable weather. Fifty 

 lantern slides made from local subjects were exliibited. 

 These comprised : — Actinophrys eichornii, Vorticella, 

 Epistylis, Desmids, Closterium Lunata and Striolata, 

 micrasterias denticulata, Spirogyra, with specimens con- 

 jugating, Batrachospermum Moniliforme, Volvox globator, 

 Conochilus volvox, a rare Rotifer Brachionis Falcatus, 

 Limnia ceratophylli, Melicerta Ringens, Utricaria capsules 

 enclosing larva of Ceratopogon, Tanipus, also Cyclops 

 Quadricornis, Tub if ex rivulorum, Nais, and Nais proboscidea 

 in the act of dividing, Hydra Fusca, with slide showing 

 its various oigans, Cypris, Pulex Daphnia, and the hyaline 

 form of carinata, Scapholeberis mucronata, Cyclops quadri- 

 cornis, male and female, Cetochilis Australiensis, various 

 larvae of the caddis fly, using different materials to form 

 their cases. Tlie Water measurer, Hydrometra stagnorum, 

 with parasite on thorax, ^Naucorides beetles, !Notolecta 

 Glauca, Ranatra linearis, GjTinus Natator, Larva of the 

 Dragon fly, the Ephemera, Coretha larva, and pupa, 

 Hydropdilus. Afterwards some living specimens were 

 placed in glass tanks before the powerful lens of the electric 

 lantern ; their magnification, and the manner in which 

 various organs were seen, excited much interest as well as 

 amusement, some of the larva much resembling pre- 

 historic monsters. 



